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DESCRIPTION AND APPLICATIONS
The military data bus specification, MIL-STD-1553, has brought about
the need for versatile pulse transformers that meet all the electrical
requirements of Manchester II serial biphase data transmission. Our var-
ious package styles provide the turns ratio configurations, component
isolation, and common-mode rejection ratio characteristics necessary for
MIL-STD-1553A and B compliance.
The step-up and step-down ratios complement DDC’s entire MIL-STD-
1553 product line and are compatible with competitors’ drivers, receivers
and transceivers. Hermetically sealed or epoxy cased, these transform-
ers are multitapped to accommodate existing system configurations.
Encapsulated in accordance with MIL-PRF-21038, their tin-coated, cop-
per-clad steel leads (epoxy-cased units) conveniently accommodate
printed circuit board mounting. Sinusoidal or trapezoidal waveforms are
accurately processed, making these transformers an excellent choice for
any MIL-STD-1553A or B application.
N : 1
E
OUT
E
= 10 V rms at 1 MHz
IN
Calc: CMR = 20 log
(see note)
E
IN
E
OUT
E
IN
1 : N
E
OUT
(SEE NOTE)
E
= 250 kHz square wave, 27.0 volts peak-to-peak with
IN
a rise and fall time no greater than 100 ns.
Calc : Droop =
x 100%. (see figure 1 for E )
D
E
D
E
OUT
E
IN
(SEE NOTE)
360
E
OUT
E
D
E
D
E
OUT
t
r
10%
90%
t = value as per Specifications Table
r
% DROOP =
x 100%
OVERSHOOT AND
RINGING ±1 V MAX
E
D
E
OUT
t
f
FIGURE 1. WAVEFORM INTEGRITY
FIGURE 2. CIRCUIT FOR COMMON-MODE REJECTION
FIGURE 3. CIRCUIT FOR WAVEFORM INTEGRITY
Note: Input to be applied and output to be measured for all dash numbers as shown. N represents highest turns winding in each test.
MIL-STD-1553 TRANSFORMERS
1996, 1999 Data Device Corporation
FEATURES
Complete Line of Custom and
QPL Units
For Use with MIL-STD-1553A
and B, MacAir A-5690, A-5232,
and A-4905
Low Profile
Epoxy Cased, Hermetically
Sealed
-55°C to +130°C Operating
Temperature Range
Built and Tested to MIL-PRF-
21038 and MIL-STD-202
PULSE TRANSFORMERS
A Subsidiary of Data Device Corporation
40 Orville Drive, Bohemia, NY 11716-2529
Phone: (631) 244-7393; Fax: (631) 244-8893
Web site: www.bttc-beta.com